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/* Test file for mpfr_add1sp.
Copyright 2004-2016 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-test.h"
static void check_special (void);
static void check_random (mpfr_prec_t p);
static void
check_overflow (void)
{
mpfr_t x, y, z1, z2;
mpfr_exp_t emin, emax;
emin = mpfr_get_emin ();
emax = mpfr_get_emax ();
set_emin (-1021);
set_emax (1024);
mpfr_inits (x, y, z1, z2, (mpfr_ptr) 0);
mpfr_set_str1 (x, "8.00468257869324898448e+307");
mpfr_set_str1 (y, "7.44784712422708645156e+307");
mpfr_add1sp (z1, x, y, MPFR_RNDN);
mpfr_add1 (z2, x, y, MPFR_RNDN);
if (mpfr_cmp (z1, z2))
{
printf ("Overflow bug in add1sp.\n");
exit (1);
}
mpfr_clears (x, y, z1, z2, (mpfr_ptr) 0);
set_emin (emin);
set_emax (emax);
}
int
main (void)
{
mpfr_prec_t p;
tests_start_mpfr ();
check_special ();
for(p = MPFR_PREC_MIN; p < 200 ; p++)
check_random (p);
check_overflow ();
tests_end_mpfr ();
return 0;
}
#define STD_ERROR \
do \
{ \
printf("ERROR: for %s and p=%lu and i=%d:\nB=", \
mpfr_print_rnd_mode ((mpfr_rnd_t) r), (unsigned long) p, i); \
mpfr_dump (b); \
printf ("C="); mpfr_dump (c); \
printf ("add1 : "); mpfr_dump (a1); \
printf ("add1sp: "); mpfr_dump (a2); \
exit(1); \
} \
while (0)
#define STD_ERROR2 \
do \
{ \
printf("ERROR: Wrong inexact flag for %s and p=%lu and i=%d:\nB=", \
mpfr_print_rnd_mode ((mpfr_rnd_t) r), (unsigned long) p, i); \
mpfr_dump (b); \
printf ("C="); mpfr_dump (c); \
printf ("A="); mpfr_dump (a1); \
printf ("Add1: %d. Add1sp: %d\n", inexact1, inexact2); \
exit(1); \
} \
while (0)
#define SET_PREC(_p) \
{ \
p = _p; \
mpfr_set_prec(a1, _p); mpfr_set_prec(a2, _p); \
mpfr_set_prec(b, _p); mpfr_set_prec(c, _p); \
}
static void
check_random (mpfr_prec_t p)
{
mpfr_t a1, a2, b, bs, c, cs;
int r;
int i, inexact1, inexact2;
mpfr_inits2 (p, a1, a2, b, c, (mpfr_ptr) 0);
for (i = 0 ; i < 500 ; i++)
{
mpfr_urandom (b, RANDS, MPFR_RNDA);
mpfr_urandom (c, RANDS, MPFR_RNDA);
if (MPFR_IS_PURE_FP(b) && MPFR_IS_PURE_FP(c))
{
if (randlimb () & 1)
mpfr_neg (b, b, MPFR_RNDN);
if (randlimb () & 1)
mpfr_neg (c, c, MPFR_RNDN);
if (MPFR_GET_EXP(b) < MPFR_GET_EXP(c))
{
/* Exchange b and c, except the signs (actually, the sign
of cs doesn't matter). */
MPFR_ALIAS (bs, c, MPFR_SIGN (b), MPFR_EXP (c));
MPFR_ALIAS (cs, b, MPFR_SIGN (c), MPFR_EXP (b));
}
else
{
MPFR_ALIAS (bs, b, MPFR_SIGN (b), MPFR_EXP (b));
MPFR_ALIAS (cs, c, MPFR_SIGN (c), MPFR_EXP (c));
}
for (r = 0 ; r < MPFR_RND_MAX ; r++)
{
mpfr_flags_t flags1, flags2;
if (r == MPFR_RNDF) /* inexact makes no sense, moreover
mpfr_add1 and mpfr_add1sp could
return different values */
continue;
mpfr_clear_flags ();
inexact1 = mpfr_add1 (a1, bs, cs, (mpfr_rnd_t) r);
flags1 = __gmpfr_flags;
mpfr_clear_flags ();
inexact2 = mpfr_add1sp (a2, b, c, (mpfr_rnd_t) r);
flags2 = __gmpfr_flags;
if (! mpfr_equal_p (a1, a2))
STD_ERROR;
if (inexact1 != inexact2)
STD_ERROR2;
MPFR_ASSERTN (flags1 == flags2);
}
}
}
mpfr_clears (a1, a2, b, c, (mpfr_ptr) 0);
}
static void
check_special (void)
{
mpfr_t a1, a2, b, c;
int r;
mpfr_prec_t p;
int i = -1, inexact1, inexact2;
mpfr_inits (a1, a2, b, c, (mpfr_ptr) 0);
for (r = 0 ; r < MPFR_RND_MAX ; r++)
{
if (r == MPFR_RNDF)
continue; /* inexact makes no sense, mpfr_add1 and mpfr_add1sp
could differ */
SET_PREC(53);
mpfr_set_str1 (b, "1@100");
mpfr_set_str1 (c, "1@1");
inexact1 = mpfr_add1(a1, b, c, (mpfr_rnd_t) r);
inexact2 = mpfr_add1sp(a2, b, c, (mpfr_rnd_t) r);
if (mpfr_cmp(a1, a2))
STD_ERROR;
if (inexact1 != inexact2)
STD_ERROR2;
mpfr_set_str_binary (b, "1E53");
mpfr_set_str_binary (c, "1E0");
inexact1 = mpfr_add1(a1, b, c, (mpfr_rnd_t) r);
inexact2 = mpfr_add1sp(a2, b, c, (mpfr_rnd_t) r);
if (mpfr_cmp(a1, a2))
STD_ERROR;
if (inexact1 != inexact2)
STD_ERROR2;
}
mpfr_set_prec (c, 2);
mpfr_set_prec (a1, 2);
mpfr_set_prec (a2, 2);
mpfr_set_str_binary (c, "1.0e1");
mpfr_set_str_binary (a2, "1.1e-1");
mpfr_set_str_binary (a1, "0.11E2");
mpfr_add1sp (a2, c, a2, MPFR_RNDN);
if (mpfr_cmp (a1, a2))
{
printf ("Regression reuse test failed!\n");
exit (1);
}
mpfr_set_prec (a1, 63);
mpfr_set_prec (b, 63);
mpfr_set_prec (c, 63);
mpfr_set_str_binary (b, "0.111111101010110111010100110101010110000101111011011011100011001E-3");
mpfr_set_str_binary (c, "0.101111111101110000001100001000011000011011010001010011111100111E-4");
mpfr_clear_inexflag ();
mpfr_add1sp (a1, b, c, MPFR_RNDN);
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_clears (a1, a2, b, c, (mpfr_ptr) 0);
}
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